High Level Summary of Statistics Trend Last update: November, 2011
The Scottish Household Survey Travel Diary showed that 10 per cent of drivers felt their journey was delayed due to congestion in 2010, in line with the 2009 figure. Although the proportion of driver journeys due to congestion increased from 11% in 2003 to a peak of 14% in 2007, levels have been declining since. The 2010 figure is broadly comparable to 2003 congestion levels.
Data is based on drivers' own perception of whether or not their journeys by car were delayed due to congestion, regardless of the journey type, purpose or the nature of the roads they travelled on. Reductions in congestion enable shorter and more reliable journey times, contributing to improved productivity and economic growth.
The Scottish Government has established a National Indicator to reduce the proportion of driver journeys delayed due to traffic congestion. A change within +/- 1.0 percentage points of the previous year's figure suggests that the position is more likely to be maintaining than showing any change.
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Source: Scottish Household Survey: Travel Diary